The aim of this study was to investigate the effect of cress seeds supplementation on growth
performance, carcass characteristics and behavior of broilers. A total of sixty-one- month day
old cockerels were utilized for this study, obtained from a local commercial farm. They were
randomly distributed to four groups (n=15, each) with three replicates within group. In the
first group, birds were fed on basal diet without addition of cress seeds (CS) which was
assigned as control. In second, third and fourth groups birds were fed on basal diet with
supplementation of different concentrations of cress seeds (0.5 (T1), 1(T2) and 1.5 (T3) %
respectively). The treatment was continued for 5 weeks period. The obtained results showed
that supplementation with cress seeds at concentration of 1% has positive effect on broiler
body weight, weight gain, feed consumption, production efficiency factor, broiler index and
ingestive and sitting behavior. The relative weights of proventriculus, gizzard and heart were
significantly affected by dietary inclusion of CS into broiler diets. Serum total protein and
globulin were significantly (P<0.05) increased in experimental groups compared with control
group. The results also showed that the supplementation of chicks by 1% cress seeds could
enhance the economic efficiency. It was concluded that supplementation of cress seeds by 1%
in ration could improve the behavior, growth performance and economic efficiency of
broilers.